The Etar calendar app would be the best choice for users who are looking for an alternative calendar app from the default Android calendar. It is an Android open-source project but comes up with bulk features like creating events, month, week, day, agenda view, and customizable reminders. As it is an open source project anyone can inspect the code and modify it. You can contribute to the Etar code that is available on GitHub.

Etar Calendar app for Android devices

- The Etar app would be very small in size and minimalistic with a modern user interface.
- It supports multiple time zones so, scheduling across different regions would be possible.
- Create, edit, and manage events with color coding to recognize them easily.
- Customize the calendar with different types of themes. We can choose from system default, light, dark and black. Pure black night mode and real event colors option would be a leap forward in the app.
- Synchronize contacts with the Etar app to make it more comfortable to manage events.
- Add events with a particular color, location, description, and URL. Mention the event whether it is a single time or repeats weekly.
- We can choose a time zone from the list of time zones while creating the event.
- Add CalDAV calendar, EteSync calendar and offline calendar to Etar calendar app. It also works with Google Calendar.
- Download the Etar calendar from the Google Play store

Etar calendar app is open source so, it would not collect any data. Good choice for users who are very strict about their privacy. Users from the community frequently contribute to Etar app updates and improvements.
FAQ’s
Of course, the Etar calendar syncs with other calendars like Google Calendar, Outlook, and CalDAV.
Yes, it is free, and the premium version is also available with additional functionalities.
No, it is not available for iOS devices. As of now, it is fully developed for Android devices only.